Misc - KANNO Atsushi
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B-10-24 Analysis of Optical-Electrical Hybrid Signal Equalization for polarization division multiplexed signal
Maruyama Shinya, Tomishige Kazunari, Sotobayashi Hideyuki, Kanno Atsushi, Kawanishi Tetsuya
Proceedings of the IEICE General Conference 2014 ( 2 ) 392 - 392 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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B-10-25 Analysis of QPSK-homodyne transmission using a single dual-drive mach-zehnder modulator in 1-μm region
Yagi Fumiya, saito Kei, Kanno Atsushi, Yamamoto Naokatsu, Akahane Kouichi, Kawanishi Tetsuya, Sotobayashi Hideyuki
Proceedings of the IEICE General Conference 2014 ( 2 ) 393 - 393 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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Quantum dot photonic devices for realizing T+O band photonic network system
YAMAMOTO Naokatsu, AKAHANE Kouichi, KANNO Atsushi, UMEZAWA Toshimasa, KAWANISHI Tetsuya, SOTOBAYASHI Hideyuki, TAKAI Hiroshi
113 ( 396 ) 293 - 298 2014.01
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
Pioneering optical frequency resources is essential to enhance a photonic network capacity. Currently, we have focused on a use of a 1.0-1.26μm wavelength band (Thousand-band: T-band) and 1.26-1.32μm wavelength band (O-band) as the novel optical frequency resources for the optical communications. Semiconductor quantum dot (QD) structure is expected to become attractive optical gain material for high-performance and ultra-broadband photonic ICT devices used in the T+O band. In this paper, we propose some technique such as sandwiched sub-nano separator (SSNS) to obtain a high-quality and broadband QD optical gain. We successfully develop and characterize a wavelength tunable QD laser, QD optical frequency comb laser (QD-CML), and high-frequency optical mode-locked QD laser.
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Digital Optical Phase-Locked Loop for High-speed Optical Coherent Detection
SAKAMOTO Takahide, KANNO Atsushi, KAWANISHI Tetsuya
113 ( 397 ) 277 - 280 2014.01
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
Digital coherent receiver is a powerful technique for detecting PSK or QAM signals. However, the receiver requires high-speed digital signal processor clocked at the symbol rate or higher rate. We demonstrate real-time homodyne demodulation of a 40-Gb/s BPSK signal by using novel digital optical phase-locked loop with a Costas-loop structure. The optical carrier is locally recovered in the receiver side with a slow-speed digital signal processor employing bandwidth-enhanced samplers.
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Development of high speed photodetector for millimeter wave Radio over Fiber system
UMEZAWA Toshimasa, AKAHANE Koichi, KANNO Atsushi, KAWANISHI Tetsuya
IEICE technical report. Electron devices 113 ( 357 ) 25 - 28 2013.12
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
To realize foreign object debris imaging alert system in crowded airports using 90GHz radio over fiber technologies, high speed and high SNR optical modulator, high speed photodetector with high conversion would be one of key devices. We have designed and developed a 30GHz photodetector with high OE conversion using LC resonant peaking technique in frequency response, owing to combining with a RF tripler. The OE conversion gain of 1000V/W at 33GHz could be achieved with a low noise amplifier. The design and the properties will be discussed.
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Application of InAs based quantum dot layer for high speed photo-detection device
UMEZAWA Toshimasa, AKAHANE Kouji, KANNO Atsushi, KAWANISHI Tetsuya
Technical report of IEICE. OPE 113 ( 263 ) 95 - 98 2013.10
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
For an application of quantum dot photo-detection devices, we have proposed and demonstrated new high speed photodiodes using In As based quantum dots absorption layer. To compare the performances with conventional In GaAs based photodiode, low dark current, high absorption coefficient and avalanche multiplication effect were observed in the new devices. The 3dB bandwidth at low bias was expected as approximately 50GHz, and the Gain Bandwidth (GB) products in avalanche multiplication region would be 150GHz to 200GHz.
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Application of InAs based quantum dot layer for high speed photo-detection device
UMEZAWA Toshimasa, AKAHANE Kouji, KANNO Atsushi, KAWANISHI Tetsuya
Technical report of IEICE. LQE 113 ( 264 ) 95 - 98 2013.10
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
For an application of quantum dot photo-detection devices, we have proposed and demonstrated new high speed photodiodes using In As based quantum dots absorption layer. To compare the performances with conventional In GaAs based photodiode, low dark current, high absorption coefficient and avalanche multiplication effect were observed in the new devices. The 3dB bandwidth at low bias was expected as approximately 50GHz, and the Gain Bandwidth (GB) products in avalanche multiplication region would be 150GHz to 200GHz.
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EO-OE conversion technologies for 90-GHz radio over fiber systems
Umezawa Toshimasa, Akahane Kouichi, Kanno Atsushi, Kawanishi Tetsuya
Proceedings of the Society Conference of IEICE 2013 ( 1 ) 261 - 261 2013.09
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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Analysis of Optical-Electrical Hybrid Signal Equalizer for High Speed optical Signal
Tomishige Kazunari, Sotobayashi Hideyuki, Kanno Atsushi, Kawanishi Tetsuya
Proceedings of the Society Conference of IEICE 2013 ( 2 ) 266 - 266 2013.09
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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W-band FM-CW signal generation using optical frequency quadrupler
Kanno Atsushi, Kawanishi Tetsuya
Proceedings of the Society Conference of IEICE 2013 ( 1 ) 260 - 260 2013.09
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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Millimeter-wave multi-band radio-over-fiber transmission system based on high-speed optical modulator
KANNO Atsushi, OGAWA Hiroyo, KAWANISHI Tetsuya, SHIBAGAKI Nobuhiko, HANYU Hiroshi
Technical report of IEICE. OPE 113 ( 142 ) 151 - 154 2013.07
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
We discuss a multi-band radio-over-fiber (RoF) transmission system at a millimeter-wave band, such as 40- and 60-GHz bands, using high-speed optical modulator. Combination of the broadband optical modulator and an optical filter can form a single-sideband optical signal to transmit the millimeter-wave signal over a long optical fiber. Possibility of the millimeter-wave signal transmission without distortions is also discussed with a result of observed spurious-free dynamic range of the RoF system.
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Fabrication of semiconductor optical amplifier using highly stacked InAs quantum dot
AKAHANE Kouichi, YAMAMOTO Naokatsu, UMEZAWA Toshimasa, KANNO Atsushi, KAWANISHI Tetsuya
2013 ( 27 ) 7 - 10 2013.06
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12.5GHz repetition rate, pico-second pulse generation in 1μm region by using Mach-Zehnder Modulator and its application
MATSUMOTO Ryo, NISHI Ryuji, MOROHASHI Isao, YAMAMOTO Naokatsu, SAKAMOTO Takahide, KANNO Atushi, KAWANISHI Tetsuya, SEKINE Norihiko, HOSAKO Iwao, SOTOBAYASHI Hideyuki
Technical report of IEICE. OFT 113 ( 55 ) 15 - 18 2013.05
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
In the optical communication network, the wavebands in the C-band (1530〜1565- nm) and the L-band (1565-1625- nm) have been used. To construct the optical communication network in 1.0μm-band for expanding the available wavelength bandwidth, we developed the optical source and transport system. We demonstrate high repetition rate, pico-second pulse-train generation in the 1-μm region by using Mach-Zehnder Modulator. We also evaluate the optical source of wavelength-division-mutiplexing transmission system using the proposed pulse source.
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Two-mode lasing of wavelength tunable quantum dot laser
Akahane Kouichi, Yamamoto Naokatsu, Kanno Atsushi, Inagaki Keizo, Umezawa Toshimasa, Kawanishi Tetsuya, Endo Takashi, Tomomatsu Yasunori, Yamanoi Toshio
Technical report of IEICE. LQE 113 ( 49 ) 49 - 52 2013.05
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
A two-wavelength emission laser can be used to generate millimeter and terahertz waves by irradiating high speed photodiodes or nonlinear crystals. Recently, electro-magnetic waves at such frequencies have become important for high speed wireless communication and accurate sensing. The external cavity wavelength tunable quantum-dot (QD) laser is a candidate for fabrication of a two-wavelength emission laser because of its properties such as a simple structure, wide range of wavelength tunability, narrow linewidth, and emission wavelength stability. We have developed a QD wavelength tunable laser with a narrow linewidth and stable emission wavelength. In this study, we achieved two-wavelength emissions in the QD wavelength tunable laser by changing the external cavity configuration.
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CI-3-6 High-Speed W-band Radio Communication Based on Radio-over-fiber Technology
Kanno Atsushi, Kawanishi Tetsuya
Proceedings of the IEICE General Conference 2013 ( 1 ) "SS - 26"-"SS-27" 2013.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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B-13-6 Transmission of wave-band division multiplexed signals over a holey fiberin the T-and O-band
Yagi Humiya, Kurata Yasuaki, Yamamoto Naokatsu, Akahane Kouichi, Kanno Atsushi, Kawanishi Tetsuya, Yoshioka Yuki, Takai Hiroshi, Sotobayashi Hideyuki
Proceedings of the IEICE General Conference 2013 ( 2 ) 471 - 471 2013.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-14-15 O-Eand E-O direct conversion for 25-GHz-band RoF signal
Hasobe Shiori, Yamanaka Ryuta, Kanno Atsushi, Kawanishi Tetsuya, Sotobayashi Hideyuki
Proceedings of the IEICE General Conference 2013 ( 1 ) 295 - 295 2013.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-14-16 Highly-frequency-stabilized millimeter-wave optical two-tone signal generation using optical phaselocked loop
Yamanaka Ryuta, Jin Kazuki, Sotobayashi Hideyuki, Kamo Atsushi, Kawanishi Tetsuya
Proceedings of the IEICE General Conference 2013 ( 1 ) 296 - 296 2013.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-3-36 Precision measurement ofchirp parameter of modulators for optical frequency comb generation
yamada Yuki, Yamaguchi Yuya, Izutsu Masayuki, Kanno Atsushi, Kawanishi Tetsuya, Nakajima Hirochika
Proceedings of the IEICE General Conference 2013 ( 1 ) 196 - 196 2013.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-3-37 Bias control for high eXtinction ratio LN modulator with backward light
Tanaka Masaki, Kanno Atsushi, Kawanishi etsuya, Izutsui Masayuki, Nakajima Hirochika
Proceedings of the IEICE General Conference 2013 ( 1 ) 197 - 197 2013.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
